You probably didn’t know that there’s a Cloud Appreciation Society that recognizes new types of clouds. A new one has recently been named, the first since 1951. It’s the asperatus cloud (or, formally, Undulatus asperatus—clouds seemed to be named like organisms!), a strange, undulating formation that’s been described as looking like the surface of a rolling sea. They’re apparently rare, and their formation mysterious. But they’re gorgeous. Has anybody seen these?